A device used in the manufacture of printing ink to further disperse the solid pigment particles in the fluid ink vehicle that utilizes a rotor-stator arrangement to chop up the pigment particles and disperse them thoroughly. The ink slurry is pumped into a metal chamber where it passes between a rotating blade (the rotor) and a stationary blade (the stator). The distance between these two blades determines how finely ground the particles of pigment will be. The colloid mill can be adapted to either batch or continuous processes. (See also Three-Roll Mill, Ball Mill, and Sand/Shot Mill.)
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